AME AME5176 n General Description Synchronous Boost Converter With Low Quiescent Current n Typical Application The AME5176 is a high efficiency synchronous boost converter, which is based on a hysteretic controller topology using synchronous rectification to obtain maximum efficiency at minimal quiescent currents. The converter provides a power supply solution for products powered by a variety of batteries such as single-cell, dual-cell, tree-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Lipolymer battery. The output voltage is internally programmable in a range from 1.8V to 5V in increments of 0.1V. Moreover, the converter can be switched off by an enable pin to minimize battery drain. The maximum average input current is limited to 450mA for current limit. n Features l Very Low Start-up Voltage at 0.8V l Output Voltage Range: 1.8V~5V in 0.1V increments l Output Voltage Accuracy ± 2% l Output Currents up to 100mA l No Schottky Diode Required l Support Inductor of Multilayer Type l Typical Shutdown Current Less than 0.7uA l Typical Quiescent Current Less than 6.5uA l Over Current Protection l Over Temperature Protection l Available in SOT-23, SOT-25 and SOT-89 Package l RoHS Compliant and Halogen Free n Functional Block Diagram n Application l All One-Cell, Two-Cell and Three-Cell Alkalie, NiCd, NimH and Single-Cell Batteries l Wireless Mouse l Mobile-Applications l Hand-Held Devices Rev. B.01 1 AME Synchronous Boost Converter With Low Quiescent Current AME5176 n Pin Configuration SOT-25 Top View 5 SOT-25 Top View AME5176-AEVxxx 1. LX 2. GND 3. OUT 4. NC 5. EN 4 AME5176 1 2 3 5 AME5176-BEVxxx 1. EN 2. OUT 3. NC 4. GND 5. LX 4 AME5176 1 2 3 * Die Attach: Conductive Epoxy * Die Attach: Non-Conductive Epoxy SOT-23 Top View SOT-89 Top View AME5176 AME5176-AETxxx 1. GND 2. LX 3. OUT 1 * Die Attach: Non-Conductive Epoxy 3 2 AME5176-AFTxxx 1. GND 2. OUT 3. LX AME5176 1 2 * Die Attach: Non-Conductive Epoxy 3 n Pin Description Pin No. SOT-25 2 SOT-89 SOT-23 Pin Name Pin Description A B 1 5 3 2 LX 2 4 1 1 GND Ground. 3 2 2 3 OUT Output Voltage Pin. 4 3 N/A N/A NC No connect Pin. 5 1 N/A N/A EN Chip Enable (Active High). Switch pin which connected to inductor. Rev.B.01 AME Synchronous Boost Converter With Low Quiescent Current AME5176 n Ordering Information AME5176 - x x x xxx Output Voltage Number of Pins Package Type Pin Configuration Pin Configuration A (SOT-23) A (SOT-25) B (SOT-25) A (SOT-89) Rev. B.01 1. GND 2. LX 3. OUT 1. LX 2. GND 3. OUT 4. NC 5. EN Package Type Number of Pins E: SOT-2X F: SOT-89 T: 3 V: 5 Output Voltage 180: 190: 200: : : 490: 500: 1.8V 1.9V 2.0V : : 4.9V 5.0V 1. EN 2. OUT 3. NC 4. GND 5. LX 1. GND 2. OUT 3. LX 3 AME Synchronous Boost Converter With Low Quiescent Current AME5176 n Absolute Maximum Ratings Parameter Maximum Unit Input Voltage -0.3V to 7 V LX Voltage -0.3V to 7 V Output Voltage -0.3V to 7 V EN Voltage -0.3V to 7 V Electrostatic Discharge (HBM) 2000 V Electrostatic Discharge (MM) 200 V Electrostatic Discharge (CDM) 1000 V Junction Temperature 150 o Storage Temperature -65 to +150 o C C n Recommended Operating Conditions Parameter Symbol Rating VIN 0.8V to 5.5 VOUT 1.8V to 5 Junction Temperature Range TJ -40 to +125 Ambient Temperature Range TA -40 to +85 Input Voltage Output Voltage 4 Unit V o C Rev.B.01 AME Synchronous Boost Converter With Low Quiescent Current AME5176 n Thermal Information Parameter Package SOT-23 Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Die Attach Symbol Maximum Non-Conductive Epoxy Non-Conductive Epoxy SOT-25 140 θJ C 81 SOT-89 Non-Conductive Epoxy 46 SOT-23 Non-Conductive Epoxy 280 Non-Conductive Epoxy θJA 260 SOT-89 Non-Conductive Epoxy 180 SOT-23 Non-Conductive Epoxy 400 SOT-89 mW Conductive Epoxy 400 Non-Conductive Epoxy 550 Lead Temperature ( soldering 10 sec)** C/W 400 PD SOT-25 o 280 Conductive Epoxy Non-Conductive Epoxy Internal Power Dissipation 140 Conductive Epoxy SOT-25 Unit 260 o C * Measure θJC on backside center of molding compound if IC has no tab. ** MIL-STD-202G 210F Rev. B.01 5 AME Synchronous Boost Converter With Low Quiescent Current AME5176 n Electrical Specifications TA = 25oC, unless otherwise noted. Parameter Symbol Test Condition VSTART-UP IOUT=1mA, VIN :02V Hold-on Voltage(V) VHOLD IOUT=1mA, VIN :2V0V Output Accuracy ∆VOUT Min Typ Max Units DC/DC Stage Minimum Input Voltage At Startup 0.8 -2 V 0.7 V 2 % V OUT=1.8V 1.8 V V OUT=2.1V 2.1 V V OUT=2.2V 2.2 V V OUT=2.7V 2.7 V V OUT=3.0V 3 V V OUT=3.3V 3.3 V V OUT=5.0V 5 V VOUT x 1.2 6.5 Rectifying Switch on Resistance RDS(ON)_P V OUT=3.3V 1 Ω Main Switch on Resistance V OUT=3.3V 1 Ω Output Voltage Quiescent Current ∆VOUT IQ 10 µA Power MOSFET RDS(ON)_N Enable Control (SOT-25 Only) EN Logic-High Voltage VIH EN Logic-Low Voltage V IL EN Input Current IEN Shutdown Current ISD 0.8 Clamp on GND or VOUT VEN =0V, VIN =1.2V IOUT=0mA V 0.1 0.4 V 1 µA 0.7 µA 450 mA Protection Switch Current Limit ISW V OUT=3.3V NMOS Leakage Ileakage_N V OUT=3.3V 1 µA PMOS Leakage Ileakage_P V OUT=3.3V 1 µA Thermal Shutdown Temperature Thermal Shutdown Hysteresis 6 TSD 150 o C ∆TSD 20 o C Rev.B.01 AME AME5176 n Detailed Description The AME5176 is a high efficiency synchronous boost converter, which is based on a hysteretic current controller topology using synchronous rectification to obtain maximum efficiency at minimal quiescent current condition. The converter allows the use of low cost chip inductor (Support Inductor of Multilayer Type) and small ceramic input and output capacitors total only three external components. Enable Function The AME5176 has a dedicated enable pin. The device is enabled when pull the EN above 0.8V. Furthermore, the device is disabled when pull the EN below 0.4V. Over Current Limit The AME5176 provide the current limit protection function. When inductor current reaches the internal switch current limit threshold, the internal switch will be turned off. When the over current state is eliminated, the IC resumes its nornal operation. Synchronous Boost Converter With Low Quiescent Current n Application Information Inductor The Inductor is required to supply energy to the load while being driven by switched high side MOSFET. Choose inductance that will affect the period proportional to inductance. Therefore, choosing greater inductance can improve system efficiency since the switching frequency is decreased to reduce system switching losses. Finally, the choice of which style inductor to utilize mainly depends on the price vs. size requirements and any EMI constraints. Suggesting the inductance range is from 10µH to 33µH. Input Capacitor Use low ESR capacitors for the best performance. When using ceramic capacitors make sure that they have enough capacitance to provide sufficient charge to prevent excessive voltage ripple at input terminal. Furthermore, an input capacitor improves EMI problems in the power supply circuit. Output Capacitor Over Temperature Protection When the junction temperature exceeds 150oC, the over temperature protection circuit turns off the internal switch, the converter will not turn back on until the device has cooled approximately 20 degrees. For normal operation, the junction temperature cannot exceed TJ=+125oC. The output capacitor is required to place enough capacitance to improve the system efficiency and output ripple. Ceramic capacitors are recommended. Low ESR capacitors are preferred to keep the output voltage ripple low. Furthermore, the output capacitance can be estimated by: COUT ≥ L 2 Where L is the inductance. The characteristics of the output capacitor also affect the stability transient behavior of the regulation system. The AME5176 can be optimized for a wide range of capacitance and ESR values, such as solid tantalum, ceramic, and aluminum electrolytic capacitors. Rev. B.01 7 AME Synchronous Boost Converter With Low Quiescent Current AME5176 Component Reference Manufacturer Part Number Value C1 Murata GRM188R60JA106ME47 10µF, 6.3V, X5R C2 Murata GRM188R60JA106ME47 10µF, 6.3V, X5R L1 Murata LQH43PN100M26 10µH D1 ON semi MBR130T1G 1A, 30V Table 1. List of Components D1(Opt.) VIN L1 10µH LX C1 10µF OUT GND VOUT C2 10µF Typical Application Circuit Layout Considerations PCB Layout is important to achieve stable operation for switching power system at the high switching frequencies and high peak currents conditions. For best results, follow these guidelines: (1) The input capacitor placed as close and wide as possible to VIN and GND pins of the IC is recommended. (2) The output capacitor placed as close and wide as possible to VOUT and GND pins of the IC is recommended. (3) Place Lx Pin as short and wide to the IC as possible. PCB Top View 8 PCB Bottom View Rev.B.01 AME Synchronous Boost Converter With Low Quiescent Current AME5176 n Characterization Curve Quiescent Current vs. Temperature Efficiency vs. Output Current 100 6.5 VIN =1.5V , V OUT=2.7V , L=10µH Quiescent Current (uA) 90 Efficiency (%) 80 70 60 50 40 30 20 VOUT=2.1V 6 5.5 5 4.5 4 3.5 10 0 0.00010 0. 00100 0.01000 0.10000 3 -50 -25 0 25 50 75 100 125 Temperature (oC) Output Current (A) Output Voltage vs. Temperature CCM Output Voltage Ripple 2.80 V IN =1.2V , VOUT=3.3V , IOUT=27mA VOUT=2.7V Output Voltage (V) 2.75 VOUT (20mV/div) 2.70 2.65 2.60 2.55 -50 IL (50mA/div) -25 0 25 50 75 100 125 2.0µ µs/div Temperature ( oC) Power ON from Input Voltage DCM Output Voltage Ripple VIN =1.5V , VOUT=2.7V IOUT=1.5mA VOUT (1.0V/div) VIN (1.0V/div) IL (100mA/div) Rev. B.01 2.0ms/div 9 AME Synchronous Boost Converter With Low Quiescent Current AME5176 n Tape and Reel Dimension SOT-23 P0 W AME AME PIN 1 P Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Pitch (P0) Part Per Full Reel Reel Size SOT-23 8.0±0.1 mm 4.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm SOT-25 P0 W AME AME PIN 1 P Carrier Tape, Number of Components Per Reel and Reel Size 10 Package Carrier Width (W) Pitch (P) Pitch (P0) Part Per Full Reel Reel Size SOT-25 8.0±0.1 mm 4.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm Rev.B.01 AME Synchronous Boost Converter With Low Quiescent Current AME5176 n Tape and Reel Dimension (Contd.) SOT-89 P0 W AME AME PIN1 P Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Pitch (P0) Part Per Full Reel Reel Size SOT-89 12.0±0.1 mm 8.0±0.1 mm 4.0±0.1 mm 1000pcs 180±1 mm Rev. B.01 11 AME Synchronous Boost Converter With Low Quiescent Current AME5176 n Package Dimension SOT-23 SYMBOLS MILLIMETERS INCHES MIN MAX MIN MAX A 0.90 1.40 0.0354 0.0551 A1 0.00 0.15 0.0000 0.0059 b 0.30 0.50 0.0118 0.0197 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 1.90 BSC e H 2.40 3.00 0.0945 0.35BSC L θ1 0.0748 BSC 0 o 0.1181 0.0138 BSC 10 o 0 o 10o n Lead Pattern Drawing 2.40 BSC 1.00 BSC 0.80 BSC Note: 1. Lead pattern unit description: BSC: Basic. Represents theoretical exact dimension or dimension target. 2. Dimensions in Millimeters. 3. General tolerance +0.05mm unless otherwise specified. 1.90 BSC 12 Rev.B.01 AME Synchronous Boost Converter With Low Quiescent Current AME5176 n Package Dimension (Contd.) SOT-25 SYMBOLS MILLIMETERS INCHES MIN MAX MIN MAX A 0.90 1.30 0.0354 0.0512 A1 0.00 0.15 0.0000 0.0059 b 0.30 0.55 0.0118 0.0217 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 e H 1.90 BSC 2.60 L θ1 S1 0.0748 BSC 3.00 0.37 BSC 0 o 10 0.95 BSC 0.1024 0.1181 0.0146 BSC o 0o 10o 0.0374 BSC n Lead Pattern Drawing 0.70 BSC 1.00 BSC Note: 1. Lead pattern unit description: 2.40 BSC BSC: Basic. Represents theoretical exact dimension or 0.95 BSC dimension target. 2. Dimensions in Millimeters. 3. General tolerance +0.05mm unless otherwise specified. 0.95 BSC 1.90 BSC Rev. B.01 13 AME Synchronous Boost Converter With Low Quiescent Current AME5176 n Package Dimension (Contd.) SOT-89 TOP VIEW SIDE VIEW BOTTOM VIEW SYMBOLS D D2 H D1 A E 10' A1 PIN 1 C S1 e INCHES MIN MAX MIN MAX 1.39 1.60 0.0547 0.0630 A1 E2 3' MILLIMETERS 0.8 REF 0.0315 REF C 0.35 0.44 0.0138 0.0173 D 4.39 4.60 0.1728 0.1811 D1 1.35 1.83 0.0531 0.0720 E 2.28 2.60 0.0898 0.1024 I 0.32 0.56 0.0126 0.0220 e 3.00 REF 0.1181 REF 0.70 REF 0.0276 REF S1 1.50 REF 0.0591 REF FRONT VIEW E2 2.05 2.60 0.0807 0.1024 D2 1.50 1.85 0.0591 0.0728 A H I n Lead Pattern Drawing 2.600 BSC 1.400 BSC Note: 4.400 BSC 3.200 BSC 1. Lead pattern unit description: BSC: Basic. Represents theoretical exact dimension or dimension target. 2. Dimensions in Millimeters. 3. General tolerance +0.05mm unless otherwise specified. 2.800 BSC 1.900 BSC 45oC 1.800 BSC 1.600 BSC 3.000 BSC 14 Rev.B.01 www.ame.com.tw E-Mail: [email protected] Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. AME, Inc. , November 2014 Document: A015A-DS5176-B.01 Corporate Headquarter AME, Inc. 8F, 12, WenHu St., Nei-Hu Taipei 114, Taiwan . Tel: 886 2 2627-8687 Fax: 886 2 2659-2989